PVC Structures for Adhesive Applications

Abstract

A polyvinyl chloride(“PVC”) structure including from 5% to 40% by weight, based on the weight of PVC, DINCH (1,2-cyclohexane dicarboxylic acid di-isononyl ester) plasticizer coated with a certain crosslinked polymeric coating and, disposed on the crosslinked coating, a substantially uncrosslinked pressure sensitive adhesive and a method for forming the structure is provided.

1 . A structure comprising:
 a) a polyvinyl chloride(“PVC”) support, said support comprising from 5% to 40% by weight, based on the weight of PVC, DINCH (1,2-cyclohexane dicarboxylic acid di-isononyl ester) plasticizer; said support having at least one surface and, disposed thereon,   b) a crosslinked polymeric coating formed from a composition comprising an emulsion polymer bearing at least two reactive groups and a modifying compound bearing at least two complementary groups, wherein at least two of said reactive groups have formed a covalent bond with at least two of said complementary groups; and disposed on said crosslinked coating,   c) a substantially uncrosslinked pressure sensitive adhesive.   
     
     
         2 . A method for providing a structure comprising:
 a) providing a polyvinyl chloride (“PVC”) support, said support comprising from 5% to 40% by weight, based on the weight of PVC, DINCH (1,2-cyclohexane dicarboxylic acid di-isononyl ester) plasticizer; said support having at least one surface;   b) applying to said surface an aqueous crosslinkable polymeric coating comprising an substantially uncrosslinked emulsion polymer bearing at least two reactive groups and a modifying compound bearing at least two complementary groups, wherein each of said reactive groups are capable of forming a covalent bond with each of said complementary groups;   c) applying to said polymeric coating a substantially uncrosslinked aqueous pressure sensitive adhesive; and   d) drying and curing said structure.   
     
     
         3 . The method of  claim 1  or  claim 2  wherein said aqueous crosslinkable coating comprises an emulsion polymer bearing at least two reactive groups and a modifying compound bearing at least two complementary groups, wherein each of said reactive groups are capable of forming a covalent bond with each of said complementary groups. 
     
     
         4 . The method of  claim 3  where said reactive groups and their complementary groups are selected from the group consisting of : (a) acetoacetate-aldehyde;
 (b) acetoacetate-amine; (c) amine-aldehyde; (d) amine-anhydride; (e) amine-isocyanate; (f) amine-epoxy; (g) aldehyde-hydrazide; (i) carboxylic acid-epoxy; (j) carboxylic acid-carbodiimide; (k) carboxylic acid-chloro methyl ester; (l) carboxylic acid-chloro methyl amide; (m) carboxylic acid-anhydride; (n) carboxylic acid-aziridine; (o) epoxy-mercaptan; (p) isocyanate-alcohol and (q) carboxylic acid-isocyanate; wherein the first or second group in each pair may be present in said emulsion polymer or in said modifying compound.